Quick question regarding PHP-FPM and sendmail from address

Greetings fellas,
I am trying to override the default :
php_admin_value[sendmail_path] = "/usr/sbin/sendmail -t -i [email protected]"
found in the pool file to a custom address, but every time the system re-reads settings, it reverts back to webmaster. If I add a custom php directive, it gets listed in the php-fpm file, but there is now two lines, and my custom line does not get read.

How can I customize the sendmail from address with respect to php-fpm and have it stick?

You can alter the pool template file globally in /usr/local/ispconfig/server/conf/ and change the address there or remove the line so that you cab set it in php.ini settings. save the altered file in /usr/local/ispconfig/server/conf-custom/

In ISPConfig 3.1 you can resync just one server, in the current ISPConfig stable version, you have to resync all servers or resync the affected sites manually by editing someting (e.g. add a comment like "# update" in the apache directives filed and press save.